chr start stop reference nuc variant nuc depth genic status zygosity variant ID 1 31923296 31923297 G A 18 GENIC homozygous 109072443 1 31923297 31923298 A C 18 GENIC homozygous 108067309 1 31923441 31923442 C T 18 GENIC homozygous 108067310